目的了解中国学龄前儿童液体奶制品和软饮料消费现状。方法于2011年11月—2012年10月对来自全国7个城市、2个农村的977名学龄前儿童及其家长进行现场调查,比较城市、农村学龄前儿童液体乳制品、软饮料的消费频率及消费量。结果城市儿童...目的了解中国学龄前儿童液体奶制品和软饮料消费现状。方法于2011年11月—2012年10月对来自全国7个城市、2个农村的977名学龄前儿童及其家长进行现场调查,比较城市、农村学龄前儿童液体乳制品、软饮料的消费频率及消费量。结果城市儿童经常喝(≥4次/周)液体奶的比例为79.3%,明显高于农村的38.5%(P<0.001);约有30%的农村儿童基本不喝(<1次/周)液体奶,高于城市儿童的6.6%(P<0.001);城市儿童液体奶消费量为228 m L/d,高于农村儿童的57 m L/d(P<0.001)。67.5%农村儿童经常喝含糖软饮料,高于城市儿童的40.7%;农村儿童软饮料平均消费量为1 400 m L/周,高于城市儿童587 m L/周,以上差异均有统计学意义(均P<0.05)。配置型乳饮料和乳酸菌饮料是城乡学龄前儿童消费最多的饮料类型,其他依次为茶饮料、果蔬汁饮料、植物蛋白饮料和碳酸饮料。结论农村儿童液体奶摄入不足,含糖软饮料摄入较高;配置型乳饮料是学龄前儿童中消费最多的饮料。展开更多
Background: Occupational health is an important consideration, especially for people that work in an environment with pollutants. Gasoline attendants are individuals that work in filling stations. They are constantly ...Background: Occupational health is an important consideration, especially for people that work in an environment with pollutants. Gasoline attendants are individuals that work in filling stations. They are constantly exposed to gasoline fumes and automobile engine products from vehicle exhaust. This increases the risk of acute and chronic respiratory diseases and carcinogenesis among them. The risk of health complications tends to increase with the duration of exposure. The study aimed to determine the proportion of gasoline attendants with lung function impairment. Methods and Materials: Two hundred and eight eligible participants were recruited for this study. A cross-sectional analytical study was carried out in Esan West local government area of Edo state, Nigeria. The study was carried out for a period of six months from December 2015 to May 2016. A questionnaire was used to obtain information on demographic characteristics, work history, mode of exposure and duration of exposure to petrol fumes. Lung function was assessed using a DTspiro spirometer (Model POP 10. Serial no 110843-005);also the anthropometric parameters of the respondent were measured. Statistical analysis was done using IBM SPSS version 20.0. Frequency and percentages were used to present categorical data. The mean and standard deviation of continuous variables were calculated and compared using the student’s t-test. The criteria of significant association were assumed for a p-value less than 0.05. Results: A total of one hundred and forty petrol pump attendants and one hundred and forty controls participated in this study. The mean age for petrol pump attendants was 24 ± 3.1 years and 23 ± 2.8 years for the control group. There were no significant differences in the gender distribution and anthropometric parameters as observed in this study. The lung impairment pattern observed in this study was obstructive in twelve (8.6%) gasoline pump attendants and restrictive pattern in thirty-nine (27.9%) gasoline pump attendants, while only four展开更多
Background: Occupational health is an important consideration, especially for people that work in an environment with pollutants. Gasoline attendants are individuals that work in filling stations. They are constantly ...Background: Occupational health is an important consideration, especially for people that work in an environment with pollutants. Gasoline attendants are individuals that work in filling stations. They are constantly exposed to gasoline fumes and automobile engine products from vehicle exhaust. This increases the risk of acute and chronic respiratory diseases and carcinogenesis among them. The risk of health complications tends to increase with the duration of exposure. The study aimed to determine the proportion of gasoline attendants with lung function impairment. Methods and Materials: Two hundred and eight eligible participants were recruited for this study. A cross-sectional analytical study was carried out in Esan West local government area of Edo state, Nigeria. The study was carried out for a period of six months from December 2015 to May 2016. A questionnaire was used to obtain information on demographic characteristics, work history, mode of exposure and duration of exposure to petrol fumes. Lung function was assessed using a DTspiro spirometer (Model POP 10. Serial no 110843-005);also the anthropometric parameters of the respondent were measured. Statistical analysis was done using IBM SPSS version 20.0. Frequency and percentages were used to present categorical data. The mean and standard deviation of continuous variables were calculated and compared using the student’s t-test. The criteria of significant association were assumed for a p-value less than 0.05. Results: A total of one hundred and forty petrol pump attendants and one hundred and forty controls participated in this study. The mean age for petrol pump attendants was 24 ± 3.1 years and 23 ± 2.8 years for the control group. There were no significant differences in the gender distribution and anthropometric parameters as observed in this study. The lung impairment pattern observed in this study was obstructive in twelve (8.6%) gasoline pump attendants and restrictive pattern in thirty-nine (27.9%) gasoline pump attendants, while only four展开更多
The incidence of infertility has recently risen.Semen quality is an important male fertility indicator,and dietary factors can affect semen quality.We conducted this systematic review and meta-analysis to determine th...The incidence of infertility has recently risen.Semen quality is an important male fertility indicator,and dietary factors can affect semen quality.We conducted this systematic review and meta-analysis to determine the effects of healthy dietary patterns on semen quality.A literature search was conducted in 3 databases(Embase,Web of Science and PubMed)on August 21,2021.The included cross-sectional studies examined the influence of the Mediterranean,Dietary Approaches to Stop Hypertension(DASH),and prudent diet patterns on semen quality parameters;six studies(1244 subjects)were included.By comparing high consumption with low consumption of healthy dietary patterns,the results of the meta-analysis showed significantly higher sperm concentrations(mean difference[MD]=6.88×10^(6) ml^(−1),95%confidence interval[CI]:1.26×10^(6) ml^(−1)–12.49×10^(6) ml^(−1);P<0.05),a significant increase in total sperm count(MD=16.70×10^(6),95%CI:2.37×10^(6)–31.03×10^(6);P<0.05),and a significant increase in progressive sperm motility(MD=5.85%,95%CI:2.59%–9.12%;P<0.01).The sperm concentration,progressive sperm motility,and total sperm count were significantly higher in men with higher versus lower consumption of healthy dietary patterns.However,the results must be interpreted with caution.展开更多
钢丝绳的局部金属截面损失是判断钢丝绳能否安全工作的重要依据,该文提出一种基于信息融合的钢丝绳的局部金属截面损失识别算法。将其断丝根数和断口间距总和作为CMAC(Cerebellar Model Articulation Controllers)神经网络融合模型的输...钢丝绳的局部金属截面损失是判断钢丝绳能否安全工作的重要依据,该文提出一种基于信息融合的钢丝绳的局部金属截面损失识别算法。将其断丝根数和断口间距总和作为CMAC(Cerebellar Model Articulation Controllers)神经网络融合模型的输入,钢丝绳局部金属面积损失作为输出,训练CMAC神经网络模型;通过现场检测数据和已训练的识别模型可计算钢丝绳的局部金属截面损失;最后,应用仿真实例证明了利用CMAC神经网络判别金属截面损失的准确性。展开更多
文摘目的了解中国学龄前儿童液体奶制品和软饮料消费现状。方法于2011年11月—2012年10月对来自全国7个城市、2个农村的977名学龄前儿童及其家长进行现场调查,比较城市、农村学龄前儿童液体乳制品、软饮料的消费频率及消费量。结果城市儿童经常喝(≥4次/周)液体奶的比例为79.3%,明显高于农村的38.5%(P<0.001);约有30%的农村儿童基本不喝(<1次/周)液体奶,高于城市儿童的6.6%(P<0.001);城市儿童液体奶消费量为228 m L/d,高于农村儿童的57 m L/d(P<0.001)。67.5%农村儿童经常喝含糖软饮料,高于城市儿童的40.7%;农村儿童软饮料平均消费量为1 400 m L/周,高于城市儿童587 m L/周,以上差异均有统计学意义(均P<0.05)。配置型乳饮料和乳酸菌饮料是城乡学龄前儿童消费最多的饮料类型,其他依次为茶饮料、果蔬汁饮料、植物蛋白饮料和碳酸饮料。结论农村儿童液体奶摄入不足,含糖软饮料摄入较高;配置型乳饮料是学龄前儿童中消费最多的饮料。
文摘Background: Occupational health is an important consideration, especially for people that work in an environment with pollutants. Gasoline attendants are individuals that work in filling stations. They are constantly exposed to gasoline fumes and automobile engine products from vehicle exhaust. This increases the risk of acute and chronic respiratory diseases and carcinogenesis among them. The risk of health complications tends to increase with the duration of exposure. The study aimed to determine the proportion of gasoline attendants with lung function impairment. Methods and Materials: Two hundred and eight eligible participants were recruited for this study. A cross-sectional analytical study was carried out in Esan West local government area of Edo state, Nigeria. The study was carried out for a period of six months from December 2015 to May 2016. A questionnaire was used to obtain information on demographic characteristics, work history, mode of exposure and duration of exposure to petrol fumes. Lung function was assessed using a DTspiro spirometer (Model POP 10. Serial no 110843-005);also the anthropometric parameters of the respondent were measured. Statistical analysis was done using IBM SPSS version 20.0. Frequency and percentages were used to present categorical data. The mean and standard deviation of continuous variables were calculated and compared using the student’s t-test. The criteria of significant association were assumed for a p-value less than 0.05. Results: A total of one hundred and forty petrol pump attendants and one hundred and forty controls participated in this study. The mean age for petrol pump attendants was 24 ± 3.1 years and 23 ± 2.8 years for the control group. There were no significant differences in the gender distribution and anthropometric parameters as observed in this study. The lung impairment pattern observed in this study was obstructive in twelve (8.6%) gasoline pump attendants and restrictive pattern in thirty-nine (27.9%) gasoline pump attendants, while only four
文摘Background: Occupational health is an important consideration, especially for people that work in an environment with pollutants. Gasoline attendants are individuals that work in filling stations. They are constantly exposed to gasoline fumes and automobile engine products from vehicle exhaust. This increases the risk of acute and chronic respiratory diseases and carcinogenesis among them. The risk of health complications tends to increase with the duration of exposure. The study aimed to determine the proportion of gasoline attendants with lung function impairment. Methods and Materials: Two hundred and eight eligible participants were recruited for this study. A cross-sectional analytical study was carried out in Esan West local government area of Edo state, Nigeria. The study was carried out for a period of six months from December 2015 to May 2016. A questionnaire was used to obtain information on demographic characteristics, work history, mode of exposure and duration of exposure to petrol fumes. Lung function was assessed using a DTspiro spirometer (Model POP 10. Serial no 110843-005);also the anthropometric parameters of the respondent were measured. Statistical analysis was done using IBM SPSS version 20.0. Frequency and percentages were used to present categorical data. The mean and standard deviation of continuous variables were calculated and compared using the student’s t-test. The criteria of significant association were assumed for a p-value less than 0.05. Results: A total of one hundred and forty petrol pump attendants and one hundred and forty controls participated in this study. The mean age for petrol pump attendants was 24 ± 3.1 years and 23 ± 2.8 years for the control group. There were no significant differences in the gender distribution and anthropometric parameters as observed in this study. The lung impairment pattern observed in this study was obstructive in twelve (8.6%) gasoline pump attendants and restrictive pattern in thirty-nine (27.9%) gasoline pump attendants, while only four
基金supported by a grant from the National Nature Science Foundation of China(No.82173539 and No.81874268).
文摘The incidence of infertility has recently risen.Semen quality is an important male fertility indicator,and dietary factors can affect semen quality.We conducted this systematic review and meta-analysis to determine the effects of healthy dietary patterns on semen quality.A literature search was conducted in 3 databases(Embase,Web of Science and PubMed)on August 21,2021.The included cross-sectional studies examined the influence of the Mediterranean,Dietary Approaches to Stop Hypertension(DASH),and prudent diet patterns on semen quality parameters;six studies(1244 subjects)were included.By comparing high consumption with low consumption of healthy dietary patterns,the results of the meta-analysis showed significantly higher sperm concentrations(mean difference[MD]=6.88×10^(6) ml^(−1),95%confidence interval[CI]:1.26×10^(6) ml^(−1)–12.49×10^(6) ml^(−1);P<0.05),a significant increase in total sperm count(MD=16.70×10^(6),95%CI:2.37×10^(6)–31.03×10^(6);P<0.05),and a significant increase in progressive sperm motility(MD=5.85%,95%CI:2.59%–9.12%;P<0.01).The sperm concentration,progressive sperm motility,and total sperm count were significantly higher in men with higher versus lower consumption of healthy dietary patterns.However,the results must be interpreted with caution.
文摘钢丝绳的局部金属截面损失是判断钢丝绳能否安全工作的重要依据,该文提出一种基于信息融合的钢丝绳的局部金属截面损失识别算法。将其断丝根数和断口间距总和作为CMAC(Cerebellar Model Articulation Controllers)神经网络融合模型的输入,钢丝绳局部金属面积损失作为输出,训练CMAC神经网络模型;通过现场检测数据和已训练的识别模型可计算钢丝绳的局部金属截面损失;最后,应用仿真实例证明了利用CMAC神经网络判别金属截面损失的准确性。
